Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
473
FNUS75 KCYS 261133
FWSCYS
Spot Forecast for Eagle Eye...Great Plains Dispatch
National Weather Service Cheyenne WY
533 AM MDT Wed Jun 26 2024
If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227
.DISCUSSION...
Much better moisture in the area today with east to southeast winds
expected around 5 to 15 MPH. Scattered to numerous showers and storms
are expected this afternoon through the evening. The most likely timing
near the burn area is between 5PM and 10PM. Storms may bring gusty and
erratic winds, frequent lightning, and locally heavy rainfall. There is
a 50 percent chance of wetting rains. A low-level jet will develop
tonight, with southerly winds generally 15 to 25 MPH. Occasional gusts
up to 45 MPH will be possible, but RH recoveries should be good. Not
as windy Thursday, with another round of showers and storms expected,
mainly after 3PM.
.TODAY...
Sky/weather.........Mostly sunny (35-45 percent). Chance of showers
and thunderstorms late in the afternoon.
CWR.................6 percent.
LAL.................1 until 1500, then 4.
Max temperature.....83 to 85 degrees.
Min humidity........35 to 40 percent.
Wind (20 ft)........East winds 5 to 10 mph shifting to the
southeast 10 to 15 mph in the afternoon. Gusty
and erratic winds expected near thunderstorms.
Mixing height.......7300 ft AGL.
Transport winds.....East 13 to 16 mph shifting to the southeast 13
to 18 mph in the afternoon.
Smoke dispersal.....Poor (7500 knot-ft) early in the morning
increasing to good (94400 knot-ft) in the
afternoon increasing to very good (117100
knot-ft) late in the afternoon.
Haines Index........3 or very low potential for large plume
dominated fire growth.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........17 18 18 21 34 27 17 16 16 26 37 61
Weather cov..... CHC CHC CHC
Weather type.... RW RW RW
Tstm cov........ CHC CHC CHC
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
LAL.............1 1 1 1 1 1 1 1 1 4 4 4
Temp............61 63 64 66 69 72 75 78 80 83 83 81
RH..............78 72 70 68 61 55 50 45 42 38 40 44
20 FT wind dir..NE NE E E E E E E SE SE SE E
20 FT wind spd..7 8 8 9 9 9 10 10 12 12 12 12
20 FT wind gust.14 15 16 17 17 17 17 20 21 22 22 23
Mix hgt (kft)...0.7 0.9 1.4 2.0 3.1 4.4 5.5 6.2 6.7 6.9 7.3 7.3
Transp wind dir.NE NE NE NE E E E SE SE SE SE SE
Transp wind spd.13 14 16 16 15 13 13 13 14 15 15 18
Haines index....3 3 3 3 3 3 3 3 3 3 3 3
SDspl kt-ft/10008 11 19 29 41 48 61 68 80 90 94 117
.TONIGHT...
Sky/weather.........Partly cloudy. Showers and
thunderstorms likely in the evening, mainly
between 6 and 10PM.
CWR.................51 percent decreasing to 5 percent overnight.
LAL.................5 until 2400, then 3.
Min temperature.....64 to 66 degrees.
Max humidity........80 to 85 percent.
Wind (20 ft)........Southeast winds 12 to 17 mph shifting to the
south 15 to 25 mph overnight. Gusts up to 45
MPH possible. Gusty and erratic winds are expected
near thunderstorms.
Mixing height.......700 ft AGL.
Transport winds.....Southeast 21 to 28 mph shifting to the south 25
to 26 mph after 3 am.
Smoke dispersal..... very good (124100 knot-ft) early in the
evening decreasing to poor (27400 knot-ft) late
in the night decreasing to poor (15900 knot-ft)
after 3 am. Gusty and erratic winds expected near
thunderstorms.
Haines Index........2 to 3 or very low potential for large plume
dominated fire growth.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........67 74 68 69 60 59 54 42 48 44 48 51
Weather cov.....LKY LKY LKY LKY LKY LKY SCH SCH SCH SCH SCH SCH
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........LKY LKY LKY LKY LKY LKY SCH SCH SCH SCH SCH SCH
CWR.............50 50 50 50 50 50 10 10 10 10 10 10
LAL.............5 5 5 5 5 5 3 3 3 3 3 3
Temp............77 74 71 68 68 67 67 66 66 65 65 65
RH..............52 59 66 73 76 78 78 81 81 84 84 84
20 FT wind dir..E SE SE SE SE S S S S S S S
20 FT wind spd..13 13 14 15 15 16 16 16 17 16 16 14
20 FT wind gust.23 24 25 26 28 29 30 31 31 30 28 25
Mix hgt (kft)...6.9 5.6 4.0 2.6 2.0 1.7 1.6 1.4 1.3 1.1 0.9 0.7
Transp wind dir.SE SE SE SE SE SE SE S S S S S
Transp wind spd.21 21 21 22 28 33 37 36 32 28 26 25
Haines index....2 2 2 2 2 2 3 3 3 3 3 3
SDspl kt-ft/1000124 101 72 50 48 50 51 43 35 27 21 16
.THURSDAY...
Sky/weather.........Mostly sunny (45-55 percent). Chance of thunderstorms
mainly after 3PM.
CWR.................7 percent.
LAL.................1 until 1200, then 3 until 1500, then 4.
Max temperature.....Around 91.
Min humidity........32 percent.
Wind (20 ft)........Southwest winds 10 to 15 mph shifting to the
west 10 to 15 mph in the afternoon. Gusty and
erratic winds expected near thunderstorms.
Mixing height.......9300 ft AGL increasing to 11200 ft AGL late in
the afternoon.
Transport winds.....Southwest 16 to 24 mph shifting to the west 15
to 17 mph late in the afternoon.
Smoke dispersal.....Poor (13200 knot-ft) early in the morning
increasing to good (97700 knot-ft) in the
afternoon increasing to very good (139900
knot-ft) early in the morning increasing to
excellent (163800 knot-ft) in the afternoon
late in the afternoon.
Haines Index........3 to 4 or very low to low potential for large
plume dominated fire growth.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........54 39 37 37 42 38 45 52 55 57 60 62
Weather cov..... CHC CHC CHC CHC CHC CHC
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH CHC CHC CHC
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
LAL.............1 1 1 1 1 1 3 3 3 4 4 4
Temp............65 68 71 74 78 82 85 87 89 89 87 83
RH..............84 76 71 64 54 46 40 35 32 32 34 38
20 FT wind dir..S S SW SW SW SW W W W W W SW
20 FT wind spd..13 12 13 13 12 12 10 10 12 12 12 13
20 FT wind gust.23 23 23 23 22 20 18 18 20 21 22 23
Mix hgt (kft)...0.7 0.7 0.9 1.5 2.2 3.3 4.7 7.0 9.3 11 11 11
Transp wind dir.SW SW SW SW SW SW W W W W W SW
Transp wind spd.24 22 20 17 16 16 16 16 17 17 15 16
Haines index....4 4 4 4 4 4 3 3 3 3 3 3
SDspl kt-ft/100014 13 16 22 31 46 66 98 140 164 146 148
$$
Forecaster...Natoli
Requested by...Leith
Type of request...WILDFIRE
.TAG 2416721.1/CYS
.DELDT 06/26/24
.FormatterVersion 2.0.0
.EMAIL quentin.cordell@state.sd.us,jason.r.haug@usda.gov,sdgpc@firenet.gov,tylerhunt83@gmail.com